Turbine assembly and method for assembling turbine assembly

Abstract

This turbine assembly comprises: a first main body provided with a first protrusion constituting a part of an annular body formed annularly around an axis and protruding radially outward and horizontally from the annular body, and a second protrusion projecting radially outward from a position different from that of the first protrusion in the circumferential direction of the annular body; and a first casing provided with a support surface that supports the first protrusion from below, and a first recess that is recessed radially outward and that accommodates the second protrusion, the dimension of the first recess in the axial direction of the annular body being greater than the dimension of the second protrusion, the axis of the annular body being disposed horizontally, and a gap being formed in the axial direction between the second protrusion and the first recess when the second protrusion is accommodated in the first recess.

The invention claimed is: 
     
         1 . A turbine assembly comprising:
 a first main body which is a lower divided structure of an annular body formed in an annular shape around an axis, the annular body being divided into the lower divided structure of the annular body and an upper divided structure of the annular body while a horizontal plane passing through the axis is set as a boundary, wherein the lower divided structure of the annular body is configured to be assembled with the upper divided structure of the annular body to form the annular body, the first main body being provided with
 a first protrusion protruding outward in a radial direction of the annular body and in a horizontal direction, and 
 a second protrusion protruding outward in the radial direction from a position different from a position of the first protrusion in a circumferential direction of the annular body; and 
   a first casing which is a lower divided structure of an annular casing accommodating the annular body, the annular casing being divided into the lower divided structure of the annular casing and an upper divided structure of the annular casing while the horizontal plane is set as a boundary, wherein the lower divided structure of the annular casing is configured to be assembled with the upper divided structure of the annular casing to form the annular casing, the first casing being provided with
 a support surface supporting the first protrusion from below, and 
 a first recess recessed outward in the radial direction and accommodating the second protrusion, 
   wherein a dimension of the first recess in an axial direction of the annular body is larger than a dimension of the second protrusion, and   in a state where the axis of the annular body is disposed along the horizontal direction and the second protrusion is accommodated in the first recess, a gap is provided in the axial direction between the first recess and an entirety of the second protrusion inserted into the first recess.   
     
     
         2 . The turbine assembly according to  claim 1 ,
 wherein in a state where the axis of the annular body is disposed along the horizontal direction and the second protrusion is accommodated in the first recess, a dimension in a vertical direction of a portion of the second protrusion accommodated in the first recess is larger than a dimension of the gap.   
     
     
         3 . The turbine assembly according to  claim 2 ,
 wherein the first casing is provided with
 a circumferential groove provided along the circumferential direction and accommodating the second protrusion, and 
 a first hole penetrating the first casing in the radial direction, 
   the first hole communicates with the circumferential groove inside the first hole in the radial direction, and includes a side pin inserted into the first hole from the outside in the radial direction, and   a dimension of the first recess in the axial direction is defined by a surface facing the second protrusion in the side pin inserted into the first hole.   
     
     
         4 . The turbine assembly according to  claim 3 ,
 wherein the surface facing a second protrusion in the side pin is provided in a cutout formed in a tip portion of the side pin.   
     
     
         5 . The turbine assembly according to  claim 3 ,
 wherein a position of the first protrusion in the axial direction is different from a position of a center of gravity of the first main body in the axial direction.   
     
     
         6 . The turbine assembly according to  claim 2 ,
 wherein in a state where the axis of the annular body is disposed along the horizontal direction and the second protrusion is accommodated in the first recess, a gap is provided in a vertical direction between a bottom surface of the second protrusion and a bottom surface of the first recess.   
     
     
         7 . The turbine assembly according to  claim 2 ,
 wherein the second protrusion is provided below the first protrusion in a vertical direction.   
     
     
         8 . The turbine assembly according to  claim 2 ,
 wherein the first casing is provided with a second hole penetrating in the radial direction,   the first main body is provided with a second recess recessed inward in the radial direction, and   a torque pin inserted into the second hole and the second recess from the outside in the radial direction is provided.   
     
     
         9 . The turbine assembly according to  claim 2 , further comprising:
 a second main body which is the upper divided structure of the annular body, wherein the first main body and the second main body are assembled to form the annular body.   
     
     
         10 . The turbine assembly according to  claim 8 ,
 wherein the second hole communicates with a circumferential groove provided along the circumferential direction.   
     
     
         11 . The turbine assembly according to  claim 8 ,
 wherein the second protrusion includes a flange extending in the circumferential direction, and   the flange is provided with the second recess.   
     
     
         12 . The turbine assembly according to  claim 2 ,
 wherein the second protrusion and the first recess are provided on both sides of a reference line intersecting with the axis and extending in a vertical direction.   
     
     
         13 . The turbine assembly according to  claim 2 ,
 wherein the first protrusion and the second protrusion are provided at positions separated in the axial direction.   
     
     
         14 . The turbine assembly according to  claim 11 ,
 wherein the flange is provided with a plurality of slits in the circumferential direction at positions different from a position of the second recess.   
     
     
         15 . The turbine assembly according to  claim 2 ,
 wherein in the first main body, a third protrusion protruding outward in the radial direction from the first main body is provided at a position different from a position of the second protrusion in the axial direction,   a first surface facing a second protrusion side in the axial direction, which is a side where the second protrusion is present when viewed from the third protrusion in the axial direction, is provided in the third protrusion, and   a second surface facing a side opposite to the second protrusion side in the axial direction and facing the first surface in the axial direction is provided in the first casing.   
     
     
         16 . The turbine assembly according to  claim 15 , further comprising:
 an expanding/contracting member installed between the first surface and the second surface and configured to change a distance in the axial direction between the first surface and the second surface.   
     
     
         17 . The turbine assembly according to  claim 2 ,
 wherein the annular body includes a cooling air manifold assembly including at least an intermediate shaft cover and a cooling air manifold of a gas turbine.   
     
     
         18 . The turbine assembly according to  claim 1 , wherein the support surface is provided on the horizontal plane.